Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b0331f27882b38…

MALICIOUS

PDF

78.7 KB Created: 2021-02-01 15:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d1acaf7829505eccde21158cf88aa3ce SHA-1: 137fbdf99b886412aa5029d7a7719a12e609d8cd SHA-256: 85b0331f27882b38a64f8df75506c23145114384f30904ad2fcbd7768b9764b0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to potentially malicious sites, as evidenced by the numerous extracted URLs. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain text related to 'Dua for forgiveness in islam', suggesting a lure to disguise the malicious intent of redirecting users to external, untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/123?utm_term=dua+for+forgiveness+in+islam PDF link annotation
    • http://itactical.xyz/livro_de_contabilidade_analiticaf6tsz.pdfIn PDF document text
    • http://watertea.space/o_show_do_eu_completoz92zg.pdfIn PDF document text
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/setoperebukitol_kasuwimukul_fufikomew.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/b15Eji1/plague_inc_fungus_speed_run.pdfIn PDF document text
    • http://dostafood.xyz/lirissdz3f.pdfIn PDF document text
    • http://neo-tp.ru/hacker_simulator_codes9dzjp.pdfIn PDF document text
    • http://romeita.fun/chat_usa_los_angeleseczyj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divexikav/95317332593.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/7285571636.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/mesoxebasolitasek.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/83012345159.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/glassworks_floe_sheet_music.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 5148 bytes
SHA-256: 1329f8212996c09d9c1326573d0db65831f484e72b0e6cc9ac87e62d75d65f0c
font_01_sfnt_off00010a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A69 10596 bytes
SHA-256: e4e00275d323bad57f6ad74f58d7eae085545542cd8e6474eb72294b480e5d08

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